1821 First Geological Map of parts of India was of Hyderabad region by Dr H. W. Voysey

1840 Museum of Geology established in Calcutta in three rooms of Asiatic Society of Bengal

1846 D. H. Williams of British Geological Survey appointed geologic advisor to the East India Company for the purpose of carrying out geological survey of three coal bearing districts. He developed a number of deposits in Raniganj, Jharia and Karanpura coal fields

1851 Thomas Oldham arrived in Calcutta on 4th March and took charge of office on 5th March, 1851, which marks the establishment of the Geological Survey of India.

1854-55H. B. Medlicott establishes three fold subdivision of the Vindhyans
1857 H. B. Medlicott surveys Himalayan Ranges between Ravi and Ganges and lays down the foundation of Himalayan Geology.

1858-60 Geological map of the Ranigunj coal fields by W. L. Wilson published. This is the first geological map of 1" = 1 Mile published by the Geological Survey of India

1860 J. G. Medlicott recognises three principal subdivisions of the coal bearing series and applied the names Talcher, Damuda and Mahadevas.

1873 Ram Singh becomes the first Indian to join Geological survey of india (as an apprentice)

1877 Geological Gallery in the new Indian Museum was thrown open to public on January 1

1892 Geology Classes started in Presidency College, Calcutta with T. H. Holland as the first part time professor of Geology.

D. N. Wadia’s Geology of Poonch State (Kashmir) and Syntaxis of the Northwest Himalaya

1951 M. S. Krishnan becomes the first Indian to be a Director of the Geological survey of India

After independence, the country undertook programme of planned development. Since then governmental policies and priorities are going through paradigm shifts in response to the market forces. GSI has been reciprocating to these changing scenarios time and again in a prompt and apt manner.

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